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d70f54f248
We need to emit the 'initializer of X is not a constant expression' note for local constexpr variables as well.
60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
// RUN: %clang_cc1 -std=c23 -fexperimental-new-constant-interpreter -verify=expected,both %s
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// RUN: %clang_cc1 -std=c23 -verify=ref,both %s
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// RUN: %clang_cc1 -std=c23 -triple=aarch64_be-linux-gnu -fexperimental-new-constant-interpreter -verify=expected,both %s
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// RUN: %clang_cc1 -std=c23 -triple=aarch64_be-linux-gnu -verify=ref,both %s
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typedef typeof(nullptr) nullptr_t;
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const _Bool inf1 = (1.0/0.0 == __builtin_inf());
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constexpr _Bool inf2 = (1.0/0.0 == __builtin_inf()); // both-error {{must be initialized by a constant expression}} \
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// both-note {{division by zero}}
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constexpr _Bool inf3 = __builtin_inf() == __builtin_inf();
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/// Used to crash.
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struct S {
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int x;
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char c;
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float f;
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};
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#define DECL_BUFFER(Ty, Name) alignas(Ty) unsigned char Name[sizeof(Ty)]
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char bar() {
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DECL_BUFFER(struct S, buffer);
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((struct S *)buffer)->c = 'a';
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return ((struct S *)buffer)->c;
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}
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static_assert((nullptr_t){} == 0);
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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# define LITTLE_END 1
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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# define LITTLE_END 0
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#else
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# error "huh?"
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#endif
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typedef unsigned char u8x4_t __attribute__((vector_size(4)));
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constexpr u8x4_t arg1 = (u8x4_t)0xCAFEBABE; // okay
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#if LITTLE_END
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static_assert(arg1[0] == 190);
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static_assert(arg1[1] == 186);
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static_assert(arg1[2] == 254);
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static_assert(arg1[3] == 202);
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#else
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static_assert(arg1[0] == 202);
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static_assert(arg1[1] == 254);
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static_assert(arg1[2] == 186);
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static_assert(arg1[3] == 190);
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#endif
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void ghissue109095() {
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constexpr char c[] = { 'a' };
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constexpr int i = c[1]; // both-error {{constexpr variable 'i' must be initialized by a constant expression}}\
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// both-note {{declared here}}
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_Static_assert(i == c[0]); // both-error {{static assertion expression is not an integral constant expression}}\
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// both-note {{initializer of 'i' is not a constant expression}}
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}
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